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Rev | Author | Line No. | Line |
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1245 | hidnplayr | 1 | ;--------------------------------------------------------------------- |
2 | ;--------------------textured triangle procedure---------------------- |
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3 | ;--------------------------------------------------------------------- |
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4 | |||
5 | tex_triangle: |
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6 | ;----------in - eax - x1 shl 16 + y1 |
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7 | ;-------------- ebx - x2 shl 16 + y2 |
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8 | ;---------------ecx - x3 shl 16 + y3 |
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9 | ;---------------edx - nothing |
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10 | ;---------------esi - pointer to texture buffer |
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11 | ;---------------edi - pointer to screen buffer |
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12 | ;-------------stack - texture coordinates |
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13 | .tex_x1 equ ebp+4 |
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14 | .tex_y1 equ ebp+6 |
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15 | .tex_x2 equ ebp+8 |
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16 | .tex_y2 equ ebp+10 |
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17 | .tex_x3 equ ebp+12 |
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18 | .tex_y3 equ ebp+14 |
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19 | |||
20 | .x1 equ ebp-2 ;dw ? |
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21 | .y1 equ ebp-4 ;dw ? |
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22 | .x2 equ ebp-6 ;dw ? |
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23 | .y2 equ ebp-8 ;dw ? |
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24 | .x3 equ ebp-10 ;dw ? |
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25 | .y3 equ ebp-12 ;dw ? |
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26 | .dx12 equ ebp-16 ;dd ? |
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27 | .dx13 equ ebp-20 ;dd ? |
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28 | .dx23 equ ebp-24 ;dd ? |
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29 | .tex_dx12 equ ebp-28 ;dd ? |
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30 | .tex_dy12 equ ebp-32 ;dd ? |
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31 | .tex_dx13 equ ebp-36 ;dd ? |
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32 | .tex_dy13 equ ebp-40 ;dd ? |
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33 | .tex_dx23 equ ebp-44 ;dd ? |
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34 | .tex_dy23 equ ebp-48 ;dd ? |
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35 | .tex_ptr equ ebp-52 ;dd ? |
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36 | |||
37 | .scan_x2 equ ebp-56 ;dd ? |
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38 | .scan_y2 equ ebp-60 ;dd ? |
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39 | .scan_x1 equ ebp-64 ;dd ? |
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40 | .scan_y1 equ ebp-68 ;dd ? |
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41 | |||
42 | mov ebp,esp |
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43 | sub esp,68 |
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44 | ;if Ext = MMX |
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45 | ; emms |
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46 | ;end if |
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47 | mov edx,dword[.tex_x1] ; check all parameters |
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48 | or dx,dx |
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49 | jl .tt_end |
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50 | cmp dx,TEX_X-1 |
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51 | jg .tt_end |
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52 | shr edx,16 |
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53 | or dx,dx |
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54 | jl .tt_end |
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55 | cmp dx,TEX_Y-1 |
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56 | jg .tt_end |
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57 | |||
58 | mov edx,dword[.tex_x2] |
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59 | or dx,dx |
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60 | jl .tt_end |
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61 | cmp dx,TEX_X-1 |
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62 | jg .tt_end |
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63 | shr edx,16 |
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64 | or dx,dx |
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65 | jl .tt_end |
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66 | cmp dx,TEX_Y-1 |
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67 | jg .tt_end |
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68 | |||
69 | mov edx,dword[.tex_x3] |
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70 | or dx,dx |
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71 | jl .tt_end |
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72 | cmp dx,TEX_X-1 |
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73 | jg .tt_end |
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74 | shr edx,16 |
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75 | cmp dx,TEX_Y-1 |
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76 | jg .tt_end |
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77 | or dx,dx |
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78 | jl .tt_end |
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79 | |||
80 | mov edx,eax ; check X&Y triangle coordinate |
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81 | or edx,ebx |
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82 | or edx,ecx |
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83 | test edx,80008000h |
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84 | jne .tt_end |
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6619 | leency | 85 | mov dx,[size_x_var] |
1245 | hidnplayr | 86 | ; or ax,ax |
87 | ; jl .tt_end |
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6619 | leency | 88 | ; cmp ax,SIZE_Y |
89 | ; jg .tt_end |
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1245 | hidnplayr | 90 | ror eax,16 |
91 | ; or ax,ax |
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92 | ; jl .tt_end |
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6619 | leency | 93 | cmp ax,dx ;SIZE_X |
1245 | hidnplayr | 94 | jg .tt_end |
95 | rol eax,16 |
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96 | |||
97 | ; or bx,bx |
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98 | ; jl .tt_end |
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6619 | leency | 99 | ; cmp bx,SIZE_Y |
100 | ; jg .tt_end |
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1245 | hidnplayr | 101 | ror ebx,16 |
102 | ; or bx,bx |
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103 | ; jl .tt_end |
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6619 | leency | 104 | cmp bx,dx ;SIZE_X |
1245 | hidnplayr | 105 | jg .tt_end |
106 | rol ebx,16 |
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107 | |||
108 | ; or cx,cx |
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109 | ; jl .tt_end |
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6619 | leency | 110 | ; cmp cx,SIZE_Y |
111 | ; jg .tt_end |
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1245 | hidnplayr | 112 | ror ecx,16 |
113 | ; or cx,cx |
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114 | ; jl .tt_end |
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6619 | leency | 115 | cmp cx,dx ;SIZE_X |
1245 | hidnplayr | 116 | jg .tt_end |
117 | rol ecx,16 ; uff.. parameters was checked |
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118 | |||
119 | cmp ax,bx ;sort all parameters |
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120 | jle .tt_sort1 |
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121 | xchg eax,ebx |
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122 | mov edx,dword [.tex_x1] |
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123 | xchg edx,dword [.tex_x2] |
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124 | mov dword[.tex_x1],edx |
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125 | .tt_sort1: |
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126 | cmp ax,cx |
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127 | jle .tt_sort2 |
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128 | xchg eax,ecx |
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129 | mov edx,dword [.tex_x1] |
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130 | xchg edx,dword [.tex_x3] |
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131 | mov dword [.tex_x1],edx |
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132 | .tt_sort2: |
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133 | cmp bx,cx |
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134 | jle .tt_sort3 |
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135 | xchg ebx,ecx |
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136 | mov edx,dword [.tex_x2] |
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137 | xchg edx,dword [.tex_x3] |
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138 | mov dword [.tex_x2],edx |
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139 | .tt_sort3: |
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140 | mov [.y1],ax ; and store to user friendly variables |
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141 | shr eax,16 |
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142 | mov [.x1],ax |
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143 | mov [.y2],bx |
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144 | shr ebx,16 |
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145 | mov [.x2],bx |
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146 | mov [.y3],cx |
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147 | shr ecx,16 |
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148 | mov [.x3],cx |
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149 | mov [.tex_ptr],esi |
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150 | |||
151 | movsx ebx,word[.y2] |
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152 | sub bx,[.y1] |
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153 | jnz .tt_dx12_make |
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154 | |||
155 | mov dword[.dx12],0 |
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156 | mov dword[.tex_dx12],0 |
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157 | mov dword[.tex_dy12],0 |
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158 | jmp .tt_dx12_done |
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159 | .tt_dx12_make: |
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160 | mov ax,[.x2] |
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161 | sub ax,[.x1] |
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162 | cwde |
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163 | shl eax,ROUND |
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164 | cdq |
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165 | idiv ebx |
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166 | mov [.dx12],eax ; dx12 = (x2-x1)/(y2-y1) |
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167 | |||
168 | mov ax,word[.tex_x2] |
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169 | sub ax,word[.tex_x1] |
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170 | cwde |
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171 | shl eax,ROUND |
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172 | cdq |
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173 | idiv ebx |
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174 | mov [.tex_dx12],eax ; tex_dx12 = (tex_x2-tex_x1)/(y2-y1) |
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175 | |||
176 | mov ax,word[.tex_y2] |
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177 | sub ax,word[.tex_y1] |
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178 | cwde |
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179 | shl eax,ROUND |
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180 | cdq |
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181 | idiv ebx |
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182 | mov [.tex_dy12],eax ; tex_dy12 = (tex_y2-tex_y1)/(y2-y1) |
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183 | .tt_dx12_done: |
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184 | |||
185 | movsx ebx,word[.y3] |
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186 | sub bx,word[.y1] |
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187 | jnz .tt_dx13_make |
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188 | |||
189 | mov dword [.dx13],0 |
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190 | mov dword [.tex_dx13],0 |
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191 | mov dword [.tex_dy13],0 |
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192 | jmp .tt_dx13_done |
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193 | .tt_dx13_make: |
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194 | mov ax,[.x3] |
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195 | sub ax,[.x1] |
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196 | cwde |
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197 | shl eax,ROUND |
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198 | cdq |
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199 | idiv ebx |
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200 | mov [.dx13],eax ; dx13 = (x3-x1)/(y3-y1) |
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201 | |||
202 | mov ax,word[.tex_x3] |
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203 | sub ax,word[.tex_x1] |
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204 | cwde |
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205 | shl eax,ROUND |
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206 | cdq |
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207 | idiv ebx |
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208 | mov [.tex_dx13],eax ; tex_dx13 = (tex_x3-tex_x1)/(y3-y1) |
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209 | |||
210 | mov ax,word[.tex_y3] |
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211 | sub ax,word[.tex_y1] |
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212 | cwde |
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213 | shl eax,ROUND |
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214 | cdq |
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215 | idiv ebx |
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216 | mov [.tex_dy13],eax ; tex_dy13 = (tex_y3-tex_y1)/(y3-y1) |
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217 | .tt_dx13_done: |
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218 | |||
219 | movsx ebx,word[.y3] |
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220 | sub bx,word[.y2] |
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221 | jnz .tt_dx23_make |
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222 | |||
223 | mov dword [.dx23],0 |
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224 | mov dword [.tex_dx23],0 |
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225 | mov dword [.tex_dy23],0 |
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226 | jmp .tt_dx23_done |
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227 | .tt_dx23_make: |
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228 | mov ax,[.x3] |
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229 | sub ax,[.x2] |
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230 | cwde |
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231 | shl eax,ROUND |
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232 | cdq |
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233 | idiv ebx |
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234 | mov [.dx23],eax ; dx23 = (x3-x2)/(y3-y2) |
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235 | |||
236 | mov ax,word[.tex_x3] |
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237 | sub ax,word[.tex_x2] |
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238 | cwde |
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239 | shl eax,ROUND |
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240 | cdq |
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241 | idiv ebx |
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242 | mov [.tex_dx23],eax ; tex_dx23 = (tex_x3-tex_x2)/(y3-y2) |
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243 | |||
244 | mov ax,word[.tex_y3] |
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245 | sub ax,word[.tex_y2] |
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246 | cwde |
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247 | shl eax,ROUND |
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248 | cdq |
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249 | idiv ebx |
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250 | mov [.tex_dy23],eax ; tex_dy23 = (tex_y3-tex_y2)/(y3-y2) |
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251 | .tt_dx23_done: |
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252 | |||
253 | movsx eax,word[.x1] |
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254 | shl eax,ROUND |
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255 | mov ebx,eax |
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256 | |||
257 | movsx edx, word[.tex_x1] |
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258 | shl edx,ROUND |
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259 | mov [.scan_x1],edx |
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260 | mov [.scan_x2],edx |
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261 | movsx edx, word[.tex_y1] |
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262 | shl edx,ROUND |
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263 | mov [.scan_y1],edx |
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264 | mov [.scan_y2],edx |
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265 | |||
266 | mov cx,[.y1] |
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267 | cmp cx, [.y2] |
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268 | jge .tt_loop1_end |
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269 | .tt_loop1: |
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270 | push edi |
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271 | push eax |
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272 | push ebx |
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273 | push cx |
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274 | push ebp |
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275 | ;; Madis |
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276 | ;if Ext=MMX ; With MMX enabled it reverse light vectors ???? |
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277 | ; mov dword[esp-8],ROUND |
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278 | ; mov dword[esp-4],0 ; Is this a bug? Explanation down 3 lines |
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279 | ; movq mm0,qword[.scan_y1] |
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280 | ; movq mm1,qword[.scan_y2] |
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281 | ; psrad mm0,[esp-8] ;This instr. won't allow modifiers BYTE, WORD, etc. |
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282 | ; psrad mm1,[esp-8] ;It always defaults to QWORD |
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283 | ; packssdw mm0,mm1 |
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284 | ; movq [esp-8],mm0 |
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285 | ; sub esp,8 |
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286 | ;else |
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287 | |||
288 | push dword[.scan_y2] ; now I push variables on stack without shifting |
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289 | push dword[.scan_x2] |
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290 | push dword[.scan_y1] |
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291 | push dword[.scan_x1] |
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292 | |||
293 | ;end if |
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294 | |||
295 | |||
296 | |||
297 | push dword[.tex_ptr] |
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298 | |||
299 | push cx |
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300 | mov edx,ebx |
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301 | sar edx,ROUND |
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302 | push dx |
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303 | mov edx,eax |
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304 | sar edx,ROUND |
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305 | push dx |
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306 | call textured_line |
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307 | |||
308 | pop ebp |
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309 | pop cx |
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310 | pop ebx |
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311 | pop eax |
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312 | pop edi |
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313 | |||
314 | mov edx, [.tex_dx13] |
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315 | add [.scan_x1], edx |
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316 | mov edx, [.tex_dx12] |
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317 | add [.scan_x2], edx |
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318 | mov edx, [.tex_dy13] |
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319 | add [.scan_y1], edx |
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320 | mov edx, [.tex_dy12] |
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321 | add [.scan_y2], edx |
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322 | |||
323 | add eax, [.dx13] |
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324 | add ebx, [.dx12] |
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325 | inc cx |
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326 | cmp cx,[.y2] |
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327 | jl .tt_loop1 |
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328 | |||
329 | .tt_loop1_end: |
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330 | |||
331 | |||
332 | mov cx, [.y2] |
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333 | cmp cx, [.y3] |
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334 | jge .tt_loop2_end |
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335 | |||
336 | movsx ebx,word[.x2] |
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337 | shl ebx,ROUND |
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338 | |||
339 | movsx edx, word[.tex_x2] |
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340 | shl edx,ROUND |
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341 | mov [.scan_x2],edx |
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342 | movsx edx, word[.tex_y2] |
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343 | shl edx,ROUND |
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344 | mov [.scan_y2],edx |
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345 | |||
346 | .tt_loop2: |
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347 | push edi |
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348 | push eax |
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349 | push ebx |
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350 | push cx |
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351 | push ebp |
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352 | ;; Madis |
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353 | ;if Ext=MMX |
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354 | ; mov dword[esp-8],ROUND |
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355 | ; mov dword[esp-4],0 ; Is this a bug? Explanation down 3 lines |
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356 | ; movq mm0,qword[.scan_y1] |
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357 | ; movq mm1,qword[.scan_y2] |
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358 | ; psrad mm0,[esp-8] ;This instr. won't allow modifiers BYTE, WORD, etc. |
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359 | ; psrad mm1,[esp-8] ;It always defaults to QWORD |
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360 | ; packssdw mm0,mm1 |
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361 | ; movq [esp-8],mm0 |
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362 | ; sub esp,8 |
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363 | ;else |
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364 | |||
365 | ;end if |
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366 | push dword[.scan_y2] |
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367 | push dword[.scan_x2] |
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368 | push dword[.scan_y1] |
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369 | push dword[.scan_x1] |
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370 | |||
371 | |||
372 | |||
373 | push dword[.tex_ptr] |
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374 | |||
375 | push cx |
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376 | mov edx,ebx |
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377 | sar edx,ROUND |
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378 | push dx |
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379 | mov edx,eax |
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380 | sar edx,ROUND |
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381 | push dx |
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382 | call textured_line |
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383 | |||
384 | pop ebp |
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385 | pop cx |
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386 | pop ebx |
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387 | pop eax |
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388 | pop edi |
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389 | |||
390 | mov edx, [.tex_dx13] |
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391 | add [.scan_x1], edx |
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392 | mov edx, [.tex_dx23] |
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393 | add [.scan_x2], edx |
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394 | mov edx, [.tex_dy13] |
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395 | add [.scan_y1], edx |
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396 | mov edx, [.tex_dy23] |
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397 | add [.scan_y2], edx |
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398 | |||
399 | add eax, [.dx13] |
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400 | add ebx, [.dx23] |
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401 | inc cx |
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402 | cmp cx,[.y3] |
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403 | jl .tt_loop2 |
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404 | |||
405 | .tt_loop2_end: |
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406 | |||
407 | .tt_end: |
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408 | mov esp,ebp |
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409 | |||
410 | ret 12 |
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411 | |||
412 | |||
413 | textured_line: |
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414 | ;-----in -edi screen buffer pointer |
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415 | ;------------ stack: |
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416 | .x1 equ word [ebp+4] |
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417 | .x2 equ word [ebp+6] |
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418 | .y equ word [ebp+8] |
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419 | |||
420 | .tex_ptr equ dword [ebp+10] |
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421 | .tex_x1 equ [ebp+14] |
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422 | .tex_y1 equ [ebp+18] |
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423 | .tex_x2 equ [ebp+22] |
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424 | .tex_y2 equ [ebp+26] |
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425 | |||
426 | .tex_dx equ ebp-4 ;dd ? |
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427 | .tex_dy equ ebp-8 ;dd ? |
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428 | |||
429 | mov ebp,esp |
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430 | sub esp,8 |
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431 | |||
432 | mov ax,.y |
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433 | or ax,ax |
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434 | jl .tl_quit |
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6619 | leency | 435 | mov dx,[size_y_var] |
436 | cmp ax,dx ;SIZE_Y |
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1245 | hidnplayr | 437 | jg .tl_quit |
438 | |||
439 | mov ax,.x1 |
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440 | cmp ax,.x2 |
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441 | je .tl_quit |
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442 | jl .tl_ok |
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443 | |||
444 | xchg ax,.x2 |
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445 | mov .x1,ax |
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446 | |||
447 | if Ext >= MMX |
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448 | movq mm0,.tex_x1 |
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449 | movq mm1,.tex_x2 |
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450 | movq .tex_x2,mm0 |
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451 | movq .tex_x1,mm1 |
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452 | |||
453 | else |
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454 | |||
455 | mov eax,.tex_x1 |
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456 | xchg eax,.tex_x2 |
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457 | mov .tex_x1,eax |
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458 | |||
459 | mov eax,.tex_y1 |
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460 | xchg eax,.tex_y2 |
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461 | mov .tex_y1,eax |
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462 | |||
463 | end if |
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464 | |||
465 | .tl_ok: |
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466 | |||
467 | mov ebx,edi |
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468 | movsx edi,.y |
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6619 | leency | 469 | movzx eax,word[size_x_var] |
470 | lea eax,[eax*3] |
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471 | ; mov eax,SIZE_X*3 |
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1245 | hidnplayr | 472 | mul edi |
473 | mov edi,eax |
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474 | movsx eax,.x1 |
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475 | add edi,eax |
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476 | shl eax,1 |
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477 | add edi,eax |
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478 | add edi,ebx |
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479 | |||
480 | mov cx,.x2 |
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481 | sub cx,.x1 |
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482 | movsx ecx,cx |
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483 | |||
484 | mov eax,.tex_x2 |
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485 | sub eax,.tex_x1 |
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486 | cdq |
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487 | idiv ecx |
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488 | mov [.tex_dx],eax ; tex_dx=(tex_x2-tex_x1)/(x2-x1) |
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489 | |||
490 | mov eax,.tex_y2 |
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491 | sub eax,.tex_y1 |
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492 | cdq |
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493 | idiv ecx |
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494 | mov [.tex_dy],eax ; tex_dy = (tex_y2-tex_y1)/(x2-x1) |
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495 | |||
496 | mov eax,.tex_x1 |
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497 | mov ebx,.tex_y1 |
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498 | cld |
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499 | .tl_loop: |
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500 | mov edx,eax ; eax - cur x |
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501 | mov esi,ebx ; ebx - cur y |
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502 | shr edx,ROUND |
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503 | shr esi,ROUND |
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504 | macro .fluent |
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505 | { |
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506 | push eax |
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507 | push edx |
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508 | mov eax,TEX_X*3 |
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509 | mul esi |
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510 | mov esi,eax |
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511 | pop edx |
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512 | pop eax |
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513 | } |
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514 | macro .shift |
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515 | { |
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516 | shl esi,TEX_SHIFT |
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517 | lea esi,[esi*3] |
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518 | ;push edx |
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519 | ;mov edx,esi |
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520 | ;shl esi,1 |
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521 | ;add esi,edx |
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522 | ;pop edx |
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523 | } |
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524 | if TEX = FLUENTLY |
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525 | .fluent |
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526 | end if |
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527 | if TEX = SHIFTING |
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528 | .shift |
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529 | end if |
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530 | lea edx,[edx*3] |
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531 | add esi,edx |
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532 | ; shl edx,1 |
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533 | ; add esi,edx |
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534 | add esi,.tex_ptr |
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535 | movsd |
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536 | dec edi |
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537 | add eax,[.tex_dx] |
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538 | add ebx,[.tex_dy] |
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539 | loop .tl_loop |
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540 | |||
541 | .tl_quit: |
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542 | mov esp,ebp |
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543 | |||
544 | ret 18+8 |
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545 | ; .tex_dx dd ? |
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546 | ; .tex_dy dd ? |